hm.. it's 4-4-4-8 vs 4-4-4-12 (pqi).. so i am guessing it's similiar. As far the 800 timing is higher because it's rated at 800, if you are going to use a conroe system, it will be well worth it with high bandwidth.
Not so sure about m2 .. there hasn't been much about it.. so.. big unknown. Anandtech had a review a while back for the new conroe, performance looks sweet!!